[yocto] [PATCH] yocto-bsp: Fix QEMUARM based bsps to not offer SMP support

[Andre McCurdy]

On Tue, May 30, 2017 at 3:52 PM, Alejandro Hernandez
<alejandro.hernandez at linux.intel.com> wrote:
> Hey Andy,
> On 05/30/2017 05:32 PM, Andre McCurdy wrote:
>> On Tue, May 30, 2017 at 1:12 PM, Alejandro Hernandez
>> <alejandro.hernandez at linux.intel.com> wrote:
>>>
>>> Hey Leo,
>>>
>>> Nope, this change only applies to qemuARM, the other ARM based BSPs are
>>> based on > ARMv6
>>>
>>> Alejandro
>>>
>>> On 05/30/2017 02:59 PM, Leonardo Sandoval wrote:
>>>>
>>>> Alex,
>>>>
>>>> is this change only applies to qemu arm? I wonder if the native arm arch
>>>> needs a similar series.
>>>>
>>>> Leo
>>>>
>>>> On Tue, 2017-05-30 at 11:44 -0700, Alejandro Hernandez wrote:
>>>>>
>>>>> The SMP kernel config presents issues on qemuarm because:
>>>>>
>>>>> CONFIG_SMP=y
>>>>> Dependencies Missing:
>>>>>     - CPU_V6K or CPU_V7:
>>>>>       These are selected by setting:
>>>>>       CONFIG_ARCH_MULTI_V7=y
>>>>>       or
>>>>>       CONFIG_ARCH_MULTI_V6=y
>>>>>
>>>>> But our QEMU + ARM BSPs are based on armv4/v5 hence they are
>>>>> incompatible with CONFIG_SMP.
>>
>> Maybe time to think (again) about updating OE's qemu ARM builds to ARMv7.
>
> I believe qemu has deep issues with newer ARMs, and thats why it's been kept
> like that.

I think the stated reason is that since almost no real world
ARMv4/ARMv5 based projects track new releases of OE, the ARM qemu
targets are held back to ensure that ARMv4/ARMv5 continue to get some
test coverage (the fear being that if these targets don't get tested
via the OE qemuarm builds they won't get tested at all).